Original Research by School Decision on Crystal Lake South High School
Crystal Lake South High School is a mid-sized, four-year public high school in Crystal Lake, a suburban community northwest of Chicago in McHenry County. The school enrolls roughly equal numbers across grades nine through twelve, with a student body that is predominantly White, with a meaningful Hispanic enrollment and smaller shares of Asian, Black, and multiracial students. The school's free-or-reduced-price lunch rate and special education enrollment figures were not available.
Crystal Lake is a suburban municipality built around a historic downtown Main Street district and a major retail corridor along Northwest Highway. The city has a significant Metra commuter rail presence through two stations on the Union Pacific Northwest Line and is in an active growth phase, with large mixed-use redevelopment projects like Water's Edge bringing apartments, townhomes, and new retail and restaurant space to the Route 14 corridor. Housing values in the area are moderate for a Chicago suburb, and rents have moved upward modestly in the past year. The city offers recreation anchored by Three Oaks Recreation Area, a reclaimed quarry site with a lake, beach, hiking trails, and water activities, plus an established small-town downtown with events and walkability. Manufacturing, retail, healthcare, and education are the region's employment base, with major employers including AptarGroup, McHenry County College, and the retail corridor.
Crystal Lake South is one of four high schools in Community High School District 155. The district recently approved a multi-year facilities investment to renovate theaters and sports stadiums at all four schools, with theater work beginning in summer 2025 and stadium improvements completing by late 2029. This represents a significant capital commitment to extracurricular and athletic infrastructure. The district also operates an International Newcomer Academy at Crystal Lake Central High School for multilingual students new to the United States, serving students for at least a defined period with the option to graduate from that school. All juniors in the district now take the ACT as the statewide accountability assessment, a change that took effect with the 2024-25 school year.
State assessment results for Crystal Lake South were not available in the provided data. Graduation rate data was also not available. Without these metrics, it is not possible to assess proficiency levels or completion rates relative to peers in McHenry County. A parent considering Crystal Lake South may want to request these data directly from the school or district to understand academic outcomes and college readiness. The school's comparison universe is the broader set of McHenry County districts, though no specific comparative positioning on test results or graduation rates could be determined from available information.
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